From Mach-20 Glider to Humming Bird Drone

This video from TedEd begins with this question : What would you attempt to do if you knew you could not fail?

“What would you attempt to do if you knew you could not fail?” asks Regina Dugan, then director of DARPA, the Defense Advanced Research Projects Agency. In this breathtaking talk she describes some of the extraordinary projects — a robotic hummingbird, a prosthetic arm controlled by thought, and, well, the internet — that her agency has created by not worrying that they might fail.